More from this Slideshow

Ten Comeback Cit...Forbes.com used IRS data to locate counties that were losing net migrants in 2005 and that either gained them in 2010 or stemmed their losses dramatically. Migration figures refer to the net members of taxpaying households that moved into and out of these counties in the years ending in April. See Forbes interactive migration map.

Suffolk County is still losing taxpayers on balance to migration, but its low unemployment and storied institutions have drawn a new wave of inbound migrants from across the Northeast. See Boston migration.

Minnesota's most populous county continues to lose taxpayers on balance, but inbound migration has grown, attracted to a region whose diverse economy has kept unemployment low throughout the recession, and to a vibrant city center. See Minneapolis migration.

The innermost Virginia suburbs of Washington, D.C. benefited from strong job growth in the capital region, and from dense new developments near Metro stations that offer quick access by rail to the city center. See Arlington migration.